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This article in CS

  1. Vol. 10 No. 5, p. 474-476
     
    Received: Nov 7, 1969


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doi:10.2135/cropsci1970.0011183X001000050004x

Influence of Intact Tillers and Height of Cut on Regrowth and Carbohydrate Reserves of Dallisgrass (Paspalum dilatatum Poir.)1

  1. Vance H. Watson and
  2. Coleman Y. Ward2

Abstract

Abstract

Vegetatively propagated dallisgrass (Paspalum dilatatum Poir.) plants of a single clone were grown in the greenhouse and cut to a stubble height of 2.5- or 7.5-cm in a factorial combination of leaving 0, 10, 20, or 30% intact tillers. Higher daily and total regrowth yields resulted from decreasing the height of cut or leaving intact tillers. Total available carbohydrates increased as height of cut and percent intact tillers increased. Translocation of carbohydrates from intact tillers to new growth was demonstrated by treating the uncut tillers with C14 sucrose, glucose, and fructose, and following their movement at various time intervals with autoradiographs. Apparently 10% more intact tillers are sufficient for dallisgrass survival and growth under intensities of defoliation used in these studies.

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